import { DataAdapterResult } from './StatsigDataAdapter';
import { StatsigEvent } from './StatsigEvent';
import { DynamicConfig, Experiment, FeatureGate, Layer } from './StatsigTypes';
import { Flatten } from './TypingUtils';
export type StatsigLoadingStatus = 'Uninitialized' | 'Loading' | 'Ready';
export declare const ErrorTag: {
    readonly NetworkError: "NetworkError";
};
export type ErrorTag = (typeof ErrorTag)[keyof typeof ErrorTag];
type ErrorEventData = {
    error: unknown;
    tag: ErrorTag | string;
} | {
    error: unknown;
    tag: 'NetworkError';
    requestArgs: Record<string, unknown>;
};
type EventNameToEventDataMap = {
    values_updated: {
        status: StatsigLoadingStatus;
        values: DataAdapterResult | null;
    };
    session_expired: object;
    error: ErrorEventData;
    pre_logs_flushed: {
        events: Record<string, unknown>[];
    };
    logs_flushed: {
        events: Record<string, unknown>[];
    };
    pre_shutdown: object;
    initialization_failure: object;
    gate_evaluation: {
        gate: FeatureGate;
    };
    dynamic_config_evaluation: {
        dynamicConfig: DynamicConfig;
    };
    experiment_evaluation: {
        experiment: Experiment;
    };
    layer_evaluation: {
        layer: Layer;
    };
    log_event_called: {
        event: StatsigEvent;
    };
};
/**
 * Type representing various events emitted by a Statsig client.
 *
 * `values_updated` - When the Statsig clients internal values change as the result of an initialize/update operation.
 *
 * `session_expired` - When the current session has expired.
 *
 * `error` - When an unexpected error occurs within the Statsig client.
 *
 * `pre_logs_flushed` - Fired just before queued StatsigEvents are flushed to Statsig servers.
 *
 * `logs_flushed` - When queued StatsigEvents are flushed to Statsig servers.
 *
 * `pre_shutdown` - Fired just before the SDK is shutdown
 *
 * `initialization_failure` - Fired when the client fails to initialize.
 *
 * `gate_evaluation` - Fired when any gate is checked from the Statsig client.
 *
 * `dynamic_config_evaluation` - Fired when any dyanamic config is checked from the Statsig client.
 *
 * `experiment_evaluation` - Fired when any experiment is checked from the Statsig client.
 *
 * `layer_evaluation` - Fired when any layer is checked from the Statsig client.
 *
 * `log_event_called` - Fired when log event is called.
 */
export type AnyStatsigClientEvent = Flatten<{
    [K in keyof EventNameToEventDataMap]: {
        name: K;
    } & EventNameToEventDataMap[K];
}[keyof EventNameToEventDataMap]>;
export type StatsigClientEvent<T> = Extract<AnyStatsigClientEvent, {
    name: T;
}>;
export type AnyStatsigClientEventListener = StatsigClientEventCallback<StatsigClientEventName>;
export type StatsigClientEventName = AnyStatsigClientEvent['name'] | '*';
export type StatsigClientEventCallback<T extends StatsigClientEventName> = (event: T extends '*' ? AnyStatsigClientEvent : StatsigClientEvent<T>) => void;
export interface StatsigClientEventEmitterInterface {
    readonly loadingStatus: StatsigLoadingStatus;
    on<T extends StatsigClientEventName>(event: T, listener: StatsigClientEventCallback<T>): void;
    off<T extends StatsigClientEventName>(event: T, listener: StatsigClientEventCallback<T>): void;
    /**
     * (Statsig Use Only) - Same as .on() but logs errors to sdk_exception
     */
    $on<T extends StatsigClientEventName>(event: T, listener: StatsigClientEventCallback<T>): void;
    /**
     * (Statsig Use Only) - Emit StatsigClientEvents
     */
    $emt(event: AnyStatsigClientEvent): void;
}
export {};